bright bar

EN8M Bright Bars, EN8M Bright Bar Manufacturers, EN8M Bright Bar Suppliers, EN8M Bright Bar Stockist, EN8M Bright Bar Dealers, EN8M Bright Bar Distributors, EN8M Bright Bar Wholesalers, EN8M Bright Bar Steel Traders, EN8M Steel Bright Bar Hexagon Distributors, EN8M Steel Bright Round Bar, EN8M Steel Bright Bar Companies Near me.

Grade Introduction:

EN8M Bright Bars is an important type of free cutting steel that has made its way into the market. These are widely used by several industries for the use in the production of the above mentioned instruments and parts. As this type of steel forms chips when it is worked on, they can take up only an average amount of heavy duty items at a time. When they are sold in the market, the grade of the free cutting varies with its composition. Sulphur or phosphorous are the two main types of ingredients that are added to the steel, apart from some little amounts of carbon.

EN8M type of free-cutting steel in Bright Bars has Sulphur added to it with a medium amount of carbon. They are mostly round or hexagonal in shape. These bars are used for making shafts, gears, studs, pins and gears.

Bright Bars have found usage at a very wide scale, extending quality construction finish, anti-corrosive properties, and high durability.

Grade Application:

These bars are used for making shafts, gears, studs, pins and gears.

Equivalent grades:

USA Japanese Germany British France International Chinese
1345 SMnC443 EN8M EN8M EN8M —— 45Mn2

Addition to other grades:

MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS, M2, M35, M42, 2714, SKD-11, P20, P20+S, P20+Ni, SCM 420, ASTM SA-36, ASTM SA-105, SAE 1018, SAE 1020, SAE 4140, SAE 8620, 16MNCR5, 20MNCR5, C20, C35, C40, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE 52100, S40C, S355J2G3.

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bright bar

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Chemical composition:

The following table shows the chemical composition of EN8M steel:

Element C Si Mn P S
Content (%) 0.35 – 0.45 0.25 1.00 – 1.30 0.060 Max 0.12-0.20

Mechanical Properties:

Properties Metric Imperial
Hardness, Brinell (typical) 300 33
Hardness, Rockwell C (typical) 30 30
Tensile strength, ultimate 965-1030 MPa 140000-150000 psi
Tensile strength, yield 827-862 MPa 120000-125000 psi
Elongation at break (in 50 mm (2″)) 20.0% 20.0%
Compressive strength 862 MPa 125000 psi
Charpy impact (V-Notch) 27.1-33.9 J 20.0-25.0 ft-lb
Poisson’s ratio 0.27-0.30 0.27-0.30
Elastic modulus 190-210 GPa 27557-30457 ksi



Heat Treatment:

Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each EN8M steel component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities.


Heat the component slowly to 820-860°C and allow it to be heated through. Quench in oil or water.


Temper the EN8M component immediately after quenching whilst tools are still hand warm. Re-heat the EN8M component to the tempering temperature then soak for one hour per 25 millimeter of total thickness (2 hours minimum) Cool in air. For most applications tempering of EN8M will be between 550-660°C.

Physical Properties

Thermal Properties

Forging Properties:

Preheat the steel carefully, then raise temperature to 1050°C for forging. Do not forge below 850°C. After forging cool slowly, preferably in a furnace.

Stress Relieving:



Heat slowly to 680-710°C, soak well. Cool slowly in the furnace.




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